Trouton's ratio is given by (where $${\lambda _{\text{b}}}$$ = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol T_b = normal boiling point, °K )

A) $$\frac{{{\lambda _{\text{b}}}}}{{{{\text{T}}_{\text{b}}}}}$$ B) $$\frac{{{{\text{T}}_{\text{b}}}}}{{{\lambda _{\text{b}}}}}$$ C) $$\sqrt {\frac{{{\lambda _{\text{b}}}}}{{{{\text{T}}_{\text{b}}}}}} $$ D) $$\sqrt {\frac{{{{\text{T}}_{\text{b}}}}}{{{\lambda _{\text{b}}}}}} $$

Answer & Solution

Correct Answer: Option A

Troutons rule states that for most of the liquid the entropy of vaporisation is constant at boiling points and the entropy of vaporisation is given by ratio of enthalpy of vaporisation to normal boiling temperature $$\left( {{T_b}} \right)$$ nothing but troutons ratio.
$$\Delta {S_{vap}} = \frac{{\Delta {H_{vap}}}}{{{T_b}}}$$

Question posted by Examveda

Community

Join the Discussion

Join the discussion

No comments yet Be the first to discuss this question.

Keep Learning

Trouton's ratio is given by (where lambda text b = molal...

Trouton's ratio is given by (where $${\lambda _{\text{b}}}$$ = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K )

Join the Discussion

Related Questions on Chemical Engineering Thermodynamics

Trouton's ratio is given by (where $${\lambda _{\text{b}}}$$ = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol T_b = normal boiling point, °K )